# print('hell world')
# print('hello world3')
# print('hello world4')

age = 25
if age <= 18:
    print('you are adult')
elif age>18 and age <= 20:
    print('you are 20 adult')
elif age>20 and age <= 30:
    print('you are 30 adult')
else:
    print('you are not child')